Out-of-bounds Read in Ffmpeg
CVE-2026-30997
An out-of-bounds read in the read_global_param() function (libavcodec/av1dec.c) of FFmpeg v8.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/FFmpeg/FFmpeg (Product)
- excellent-oatmeal-319.notion.site/CVE-2026-30997-Out-of-Bounds-Access-a7929817b… (Exploit, Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2026-30997?
- CVE-2026-30997 is a high-severity vulnerability in Ffmpeg, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-04-13.
- How severe is CVE-2026-30997?
- High severity. CVSS v3 base score is 7.5 out of 10.